全选反选的实现

<script language="javascript">
function CheckOthers(form)
{
for (var i=0;i<form.elements.length;i++)
{
var e = form.elements;
// if (e.name != 'chkall')
if (e.checked==false)
{
e.checked = true;// form.chkall.checked;
}
else
{
e.checked = false;
}
}
}

function CheckAll(form)
{
for (var i=0;i<form.elements.length;i++)
{
var e = form.elements;
// if (e.name != 'chkall')
e.checked = true// form.chkall.checked;
}
}
</script>

<form id="form1" name="form1" method="post" action="">
<label>
<input type="checkbox" name="checkbox" value="checkbox" />
1</label>
<label>
<input type="checkbox" name="checkbox2" value="checkbox" />
2</label>
<label>
<input type="checkbox" name="checkbox3" value="checkbox" />
3</label>
<label>
<input type="checkbox" name="checkbox4" value="checkbox" />
4</label>
<label>
<input type="checkbox" name="checkbox5" value="checkbox" />
5</label>
<label>
<input type="checkbox" name="checkbox6" value="checkbox" />
6</label>
<label>
<input type="checkbox" name="checkbox7" value="checkbox" />
7</label>
<label>
<input type="checkbox" name="checkbox8" value="checkbox" />
8</label>
<label>
<input type="button" name="Submit" onclick=CheckAll(this.form) value="全选" />
</label>
<input type="button" name="Submit2" onclick=CheckOthers(this.form) value="反选" />
</form>